[U-Boot] Falcon mode for TI DM355

[U-Boot] Falcon mode for TI DM355

[Andy Pont]

Hello TI experts,

I appreciate that all of the TI DM355 support long since (August 2015)
landed in the great board scrap yard in the sky or wherever it is git
chooses to hide it!

I may have an upcoming project to reduce boot time on a pre-existing custom
platform using the DM355 and wondered if anyone had implemented SPL and
Falcon mode for it that didn't make it into mainline or whether this is
actually possible at all for this device?

Thanks,

Andy.

[U-Boot] Falcon mode for TI DM355

[Tom Rini]

On Thu, Feb 11, 2016 at 11:53:06AM -0000, Andy Pont wrote:

> Hello TI experts,
> 
> I appreciate that all of the TI DM355 support long since (August 2015)
> landed in the great board scrap yard in the sky or wherever it is git
> chooses to hide it!
> 
> I may have an upcoming project to reduce boot time on a pre-existing custom
> platform using the DM355 and wondered if anyone had implemented SPL and
> Falcon mode for it that didn't make it into mainline or whether this is
> actually possible at all for this device?

So, git commit 6761946f is what removed the board in question.  Now,
looking in mainline today (and also looking at 6761946f) I see that we
had and have support for CONFIG_TARGET_OMAPL138_LCDK and that uses SPL
which is a prerequisite for falcon mode.  So there's nothing too low
level that would need to be done for the DM355, just the board specific
portions.

-- 
Tom
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[U-Boot] Falcon mode for TI DM355

[Andy Pont]

Hi Tom,

> So, git commit 6761946f is what removed the board in question.  Now,
> looking in mainline today (and also looking at 6761946f) I see that we
> had and have support for CONFIG_TARGET_OMAPL138_LCDK and that uses SPL
> which is a prerequisite for falcon mode.  So there's nothing too low
> level that would need to be done for the DM355, just the board specific
> portions.

The current implementation for the target hardware is based on 2013.07.  Can
we make it work with that or should we look to move to something more
recent?  Not wanting to make too many changes unnecessarily.

Andy.

[U-Boot] Falcon mode for TI DM355

[Tom Rini]

On Thu, Feb 11, 2016 at 05:02:16PM -0000, Andy Pont wrote:
> Hi Tom,
> 
> > So, git commit 6761946f is what removed the board in question.  Now,
> > looking in mainline today (and also looking at 6761946f) I see that we
> > had and have support for CONFIG_TARGET_OMAPL138_LCDK and that uses SPL
> > which is a prerequisite for falcon mode.  So there's nothing too low
> > level that would need to be done for the DM355, just the board specific
> > portions.
> 
> The current implementation for the target hardware is based on 2013.07.  Can
> we make it work with that or should we look to move to something more
> recent?  Not wanting to make too many changes unnecessarily.

Well, I don't see OMAPL138_LCDK support in mainline v2013.07 so this is
going to fall into the kind of judgement calls you'll have to make and
investigate further.

-- 
Tom
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